Part of being an immigrant to this lovely green land is learning to live in a new idiom. That is to say that you must learn to live in a new figurative language. Should you manage an invite to a barbeque, I cannot recommend highly enough asking a wiggly English child if they have ants in their pants. You will become ever popular with the under-10 set, and the adults will be forced to engage you in conversation.
For those of you who are English and would like to play the game, ants in one's pants refers to a general state of wiggling or impatience for a desired event. If you want to share your own antsyness, you'll want to announce, "I have ants in my pants, and now I've got to do a boogey dance." A boogey is, of course a bogey.
Thanks to the University of Alaska, Fairbanks for the shout out in the alumni news feed.